There is a book called 10-Minute Toughness written by Jason Selk that drives home an important concept. Most people, including me, find it very easy to focus on problems. If you have an itch on your head, for example, your mind will be completely ignorant of your foot. If you find yourself face-to-face with a skunk, you rarely will think about having saved up to 15% or more on your car insurance. Focusing on problems is natural.
However, Jason Selk instructs us that we should drive our minds to relentlessly think of solutions. He says to ask yourself this question, “What is one thing I could do that could help this situation?” You don’t have to have 100 things, but you should always have at least one solution on the board. In response to your question, you should never say, “I don’t know.” You may not know all the answers, but you do know of one thing that could help alleviate your problems and make things better. Take that action now.